A retrospective cohort study was performed with consecutive 188 STEMI cases undergoing urgent PCI. The primary endpoint was in-hospital major adverse cardiac event (MACE), and the secondary endpoints were ST resolution (STR) after PCI and length of stay (LOS).
TTWI on presentation were independently associated with higher incidence of in-hospital MACE (adjusted OR 2.8; 95 % CI 1.1-7.0; p = 0.03), inadequate STR (adjusted OR 5.5; 95 % CI 2.1-14.3; p = 0.01), and longer LOS (adjusted mean increase 4.1 days; 95 % CI 0.3-7.9; p = 0.03). TTWI predicted these outcomes better than patient-reported ischemic time or pathologic Q waves.
TTWI on presentation are an independent risk factor for poor inpatient prognosis among patients presenting with STEMI undergoing urgent PCI.